Apparatus for testing and straightening arrow shafts and the like
OwnerDuane L. Davisinventor
Life of this patent
Estimating the term…
Abstract
An arrow straightener for testing and straightening bent arrow shafts is provided with a pair of arrow supports, each of which has a bearing surface that is rotatable about an axis normal to a vertical plane through the longitudinal axis of an arrow positioned on the supports to maintain the bearing surface in flat contact relation to the arrow shaft, a press mechanism between the supports for applying a straightening pressure on the arrow shaft, and a deflection indicator with a feeler that extends through the press mechanism into contact with the shaft, the feeler being movable independent of the press but located at a point central to the pressure applying surface. The apparatus also includes a scale, indicator, weighted body, and spacer for testing the spine strength of wooden arrow shafts.
Claims19
In arrow straightener apparatus having press means adapted to apply a pressure on the shaft of an arrow in a direction normal to the longitudinal axis of said shaft and in a direction to straighten said shaft, and deflection indicator means in proximity to said press means for measuring and indicating the deviation of the arrow shaft from its normally straight longitudinal axis, the improvement comprising:
- a pair of arrow supports in axially spaced-apart relation to each other, each of said supports including a a pair of bearings with circular cylindrical peripheral surfaces mounted in tandem in a mounting block on respective axes parallel to each other and to a vertical plane extending through both of said supports between said bearings in each of said supports, the peripheral surfaces of said bearings being adapted to support the arrow shaft during straightening operation, and said mounting block being adapted to swivel about an axis normal to said vertical plane to permit said bearing peripheral surfaces to be aligned flush with the surface of said arrow shaft.
In the apparatus of claim 3, wherein said bearings are of a predetermined diameter and said bearing axes are located a selected distance below said block axis such that the longitudinal axis of a common arrow shaft positioned on and supported by said bearing peripheral surfaces approximately intersects said block axis at right angles.
In arrow straightener apparatus having a pair of arrow supports in spaced-apart relation to each other, press means positioned between said supports for applying a transversely directed pressure on an arrow positioned on said supports, and deflection indicator means in proximity to said press for measuring and indicating the deviation of an arrow shaft from its normally straight longitudinal axis, said deflection indicator means including an elongated axially extendable and retractable feeler shaft positioned such that its distal end contacts the arrow shaft, the improvement comprising:
- said press means including a pressure applying surface for contacting the arrow shaft and applying straightening pressure thereon, said pressure applying surface being positioned in concentric surrounding relation to said feeler shaft, said pressure applying surface and said feeler shaft being movable independent of each other.
Arrow straightener and test apparatus, comprising:
- an elongated frame member;
- two support means on opposite ends of said frame member for supporting opposite ends of an arrow thereon, said support means being adjustably mounted to move respectively toward and away from each other and each support means including a bearing surface on which the arrow is positioned for support, said bearing surface being mounted to swivel about an axis transverse to said frame member and to an arrow properly positioned on said supports;
- press means positioned between said support means for applying transverse pressure on the shaft of the arrow for straightening, said press means including a vertical guide shaft affixed to and extending upwardly from said frame member, a guide sleeve slidably positioned around said shaft, a horizontal press arm affixed to and extending radially from said sleeve transverse to said frame to a position over the location of the arrow shaft when properly positioned on said support means, a load applying surface on the bottom of said press arm near its distal end in alignment with the location of the arrow shaft, and drive means connected to said press arm for forcing downwardly to apply straightening pressure on said arrow;
- and
- measuring means for measuring and indicating the deflection of the arrow shaft from a straight longitudinal axis, said measuring means including feeler means positioned at the axial center of said load applying surface in continuous contact with the arrow shaft for detecting the position of said shaft at the location where the straightening pressure is applied, and indicator means for transforming the arrow shaft position detected by said feeler means into a visual display for accurate perception by the operator of the apparatus.
Straightener apparatus for straightening an elongated shaft, comprising:
- press means adapted to apply a force on the shaft in a direction substantially normal to the longitudinal axis of the shaft;
- and
- a pair of shaft supports in axially spaced-apart relation to each other positioned on opposite sides of said press means, each of said supports including a bearing surface adapted for supporting the shaft during straightening operations, and swivel mounting means for mounting said bearing surface in said support in a manner whereby said bearing surface is adapted to swivel about an axis which is positioned to intersect at substantially a right angle a portion of the shaft supported on said bearing surface.
Dependencies are inferred from the claim text.